Comparison: Leikr vs. Garmin 305 vs. iPhone with Endomondo
On a tangent - if I continue to do these comparisons, my Endomondo mileage is really going to tick up quickly!
16.01 km, 1:50:40
Garmin 305: https://www.endomondo.com/workouts/379659092
15.73 km, 1:51:16
16.01 km, 1:51:14
I turned on Leikr and 305 at home, before driving to the location where I would start my run. IPhone was already on, of course.
Leikr on left wrist. 305 in pocket of Camelbak, with antenna facing up (clear view of the sky). IPhone in pocket of Camlebak, with clear view of the sky. Autolap "On" on all three devices. Leikr software version 1.10.28. Autopause "Off" on all three devices.
Disregard the time differences - I had to start the Endomondo app and put the phone away, then start the 305 and tuck it away, then started Leikr. Leikr was the first to get stopped at the end of the run, then had to pull 305 and iPhone out of pockets to stop them.
For those who may not have followed my previous posts (comparing Leikr against my 305), I have found through careful analysis that my 305 typically under-reports the distance travelled. I've noted this on courses of known distance, and it appears to be consistently about .02 mi short, per mile travelled. Considering the distance of 10 miles on this day, that gives an offset of about .20 miles from the actual distance travelled. 305 reports a final distance of 15.73 km (9.83 mi), but adding back the .20 mi brings it to 10.03 mi, or 16.048 km. Were I not aware of this peculiarity of my 305, I might consider Leikr and iPhone to be mis-reporting. However, both iPhone and Leikr are spot-on against each other, and both compare favorably to 305's adjusted distance.
Taking it a step further, I plotted the route on Google Maps, and found that I was in about the location I had expected to be at the 8km turnaround point.
Compared to both iPhone and 305, Leikr's track is still more variable (less smooth).
Heart rate averages and highs are consistent between the three devices.
Elevation chart is consistent to the point of suspicion between iPhone and 305, but Leikr is substantially different and - in my opinion - more closely reflects the actual terrain. For example, there was not a sudden elevation change of 51 meters between 2.55 km and 2.7 km, as indicated on the 305 and iPhone charts. Consistent pace and heart rate on that stretch are good indicators of what actually happened, if my knowledge and memory of the trail will not suffice.
Spot checks of pace on Leikr during the run were still disappointing. Pace display continues to vary significantly, though my pace remained consistent (slow). I didn't do any spot check on the other two devices during the run, but my experience with 305 is that it is fairly consistent with my actual pace and has less moment-by-moment variability.